scholarly journals Genetic variation of Gmelina arborea Roxb in Trenggalek, East Java

2021 ◽  
Vol 914 (1) ◽  
pp. 012014
Author(s):  
D Setiadi ◽  
M Susanto ◽  
L Baskorowati ◽  
Mashudi ◽  
S Pudjiono
Keyword(s):  
Genetic Variation ◽  
Survival Rate ◽  
Block Design ◽  
Incomplete Block ◽  
Basic Information ◽  
Open Pollination ◽  
Gmelina Arborea ◽  
Incomplete Block Design ◽  
The Mean

Abstract White teak (Gmelina arborea Roxb) is an introduced species of the verbenaceae. This study observed genetic variation of G. arborea in Trenggalek, East Java. Incomplete Block Design was used for this trial comprising four replications, five populations, 50 families, and three tree plots with planting space of 3 x 2 m. Significant differences between seed origins for height and survival rate were exhibited in this study; however, no significant differences between populations for diameter traits at 1st year old. Meanwhile, significant differences between populations for height, diameter, and survival rate existed at second years old. The mean survival rate at first and second years old were 98, 44% and 95, 95%, height were 1.23 m and 2.86 m, and stem diameter was 2.18 cm and 3.66 cm. Moderate heritability’s showed for height and diameter were (h2 i = 0.29; h2 f = 0.30), (h2 i = 0.24; h2 f = 0, 38) and (h2 i = 0.19; h2 f = 0.30), (h2 i = 0.18; h2 f = 0.28). Genetic correlation for height and diameter were rg = 0.75, and rg = 0.89. Genetic variation growth of G. arborea progeny test can be used as basic information of the plus trees selection with good performance. Therefore, the open pollination between remaining plus tress will produce a good quality of seed, which will increase the volume of timber harvested.

scholarly journals Aspectos nutricionais da variação genética em progênies de Myracrodruon urundeuva Fr. All. sob diferentes condições de cultivo

FLORESTA ◽  
1999 ◽  
Vol 29 (12) ◽  
Author(s):  
SIMONE APARECIDA DE OLIVEIRA ◽  
MARIO LUIZ TEIXEIRA DE MORAES ◽  
SALATIÉR BUZETTI
Keyword(s):  
Genetic Variation ◽  
Genetic Variability ◽  
Selection Process ◽  
Block Design ◽  
Nutrient Content ◽  
Open Pollination ◽  
Experimental Station ◽  
Old Trees

Sementes de aroeira foram obtidas a partir de 30 árvores de polinização livre, localizadas na Estação Ecológica do Instituto Florestal em Paulo de Faria - SP, em setembro de 1996. Foram instalados dois testes de progênies de aroeira (consorciado com mutambo e angico do campo – Exp 1 e homogêneo – Exp 2), em março de 1997, na Fazenda de Ensino e Pesquisa da FEIS/UNESP, em Selvíria - MS. O delineamento experimental utilizado foram os blocos casualizados, tanto no experimento consorciado como no homogêneo. Os caracteres nutricionais avaliados foram o conteúdo de: N, P, K, Ca, Mg e S. As estimativas de parâmetros genéticos foram obtidas em nível de média de parcelas. A herdabilidade, aos dois anos, variou de 0,05 (para o Mg) a 0,63 (para o N). Foi encontrada variabilidade genética para o teor de nutrientes e a característica mais indicada para um processo de seleção seria o conteúdo de N. Nutrient aspects of genetic variation on progeny of Myracrodruon urundeuva Fr. All. under different condition of crop Abstract Aroeira seeds were obtained from 30 trees of open pollination, located in the Estação Ecológica do Instituto Florestal in Paulo de Faria – SP, in September, 1996. Two tests of Aroeira progeny were conducted (mutambo and angico together – Exp 1 and homogeneous – Exp 2), in March, 1997, at experimental station of FEIS/UNESP, in Selvíria – MS. A randomized completely block design, to both experiments was used. The nutrient content evaluated was: N, P, K, Ca, Mg, and S. The genetic estimates achieved to mean plot level and herdability on 2 year old trees was 0,05 to Mg and 0,63 to N. There was genetic variability to nutrient content and N was the better characteristic to selection process.

scholarly journals Accuracy of Ranking Individuals in Field Tests of Different Designs: A Computer Simulation

2006 ◽  
Vol 55 (1-6) ◽  
pp. 70-77 ◽  
Author(s):  
Chang-Yi Xie ◽  
Y.-B. Fu ◽  
A. D. Yanchuk
Keyword(s):  
Computer Simulation ◽  
Genetic Variance ◽  
Block Design ◽  
Additive Genetic Variance ◽  
Field Tests ◽  
Incomplete Block ◽  
Single Tree ◽  
Incomplete Block Design ◽  
Variation Patterns ◽  
Site Variation

Abstract A computer simulation was conducted to investigate the accuracy of ranking individual trees in field tests of different designs. A test population that consists of 900 trees from 45 full-sib families generated by three 6-parent disconnected half-diallels was considered. One incomplete block design with single-tree plots and four complete block designs with 1, 2, 4, and 10-tree row plots were examined. Various narrow-sense heritabilities, site variation patterns (patch sizes and gradient slopes), and two levels of dominant to additive genetic variance ratios (0 and 0.30) were evaluated. Results indicate that the accuracy of ranking depends more on the heritability of the trait and less on the magnitude of the dominant genetic variance, site variation patterns, and field designs. With patchy site variation, differences in ranking accuracy were observed for different designs, but became smaller with higher heritabilities. Impact of environmental gradient on the accuracy of individual ranking was negligible. Incomplete block design with single-tree plots (ICB1) provided the most accurate ranking when heritability was low while complete block design with 2-tree plots (RCB2) appeared to be the best when heritability was high. Large row plot designs were among the least effective in all the simulated scenarios. For traits with medium heritabilities, the statistical efficiencies of ICB1 and RCB with 1 and 2-tree plots are comparable.

scholarly journals Pengaruh Genetik dan Lingkungan Terhadap Pertumbuhan Sengon (Falcataria molucanna) Ras Lahan Jawa

2018 ◽  
Vol 4 (2) ◽  
pp. 35-41
Author(s):  
Mudji Susanto ◽  
Liliana Baskorowati
Keyword(s):  
Block Design ◽  
Incomplete Block ◽  
Incomplete Block Design

Tegakan sengon (Falcataria molucanna) ras lahan Jawa dibangun di  Bali dengan tujuan untuk mengetahui keragaman pertumbuhan yang disebabkan oleh faktor lingkungan dan genetik pada umur 1-3 tahun. Tegakan sengon tersebut dibangunsebagai uji keturunan dengan rancangan Baris Kolom Incomplete Block Design (IBD). Tegakan sengon tersebut menguji 25 famili half-sib dengan single plot. Hasil penelitian menunjukkan bahwa keragaman pertumbuhan yang disebabkanoleh faktor genetik (aditif ) maupun faktor lingkungan berubah-ubah setiap tahun. Pada tahun pertama ragam aditif mempunyai peranan 3,38% untuk tinggi pohon dan 0,67% untuk diameter batang; pada tahun kedua ragam aditif sebesar3,40% untuk tinggi pohon dan 3,05% untuk diameter batang; dan pada tahun ketiga ragam aditif sebesar 3,90% untuk tinggi pohon dan 7,00% untuk diameter batang. Sedangkan sisanya mulai tahun pertama sampai ketiga pertumbuhandipengaruhi oleh ragam lingkungan. Berdasarkan hasil penelitian disimpulkan bahwa pertumbuhan tanaman sengon ras lahan Jawa mayoritas dipengaruhi oleh faktor lingkungan, sehingga disarankan tanaman sengon ras lahan Jawa harusmenggunakan sitim silvikultur yang tepat yang dapat mempercepat pertumbuhan tanaman sengon.

OCDs in Balanced Treatment Incomplete Block Design Set-Up

2015 ◽  
pp. 113-130
Author(s):  
Premadhis Das ◽  
Ganesh Dutta ◽  
Nripes Kumar Mandal ◽  
Bikas Kumar Sinha
Keyword(s):  
Block Design ◽  
Incomplete Block ◽  
Incomplete Block Design ◽  
Set Up

scholarly journals Effect of ZnSO4 fertilizer on soil chemical properties, performance and proximate quality of sweet potato in a derived savanna ecology of Nigeria

2018 ◽  
Vol 3 (1) ◽  
pp. 644-651
Author(s):  
A.O. Adekiya ◽  
C.M. Aboyeji ◽  
T.M. Agbede ◽  
O. Dunsin ◽  
O.T.V. Adebiyi
Keyword(s):  
Sweet Potato ◽  
Block Design ◽  
Chemical Properties ◽  
Soil Chemical Properties ◽  
Storage Root ◽  
Root Yield ◽  
The Mean ◽  
The Impact ◽  
And Storage

Abstract Micro-nutrients especially zinc can not only increase the yield of sweet potato but can also improve the quality of tubers. Hence, experiments were carried out in 2015 and 2016 cropping seasons to determine the impact of various levels of ZnSO4 fertilizer on soil chemical properties, foliage and storage root yields and proximate qualities of sweet potato (Ipomoea batatas L.). The experiments consisted of 5 levels (0, 5, 10, 15 and 20 kg ha-1) of ZnSO4 fertilizer. These were arranged in a randomized complete block design and replicated three times. ZnSO4 increased (with the exception of P) soil chemical properties compared with the control. N, K, Ca, Mg and Zn were increased up to the 20 kg ha-1 ZnSO4 level in both years. ZnSO4 reduced P concentrations in soil as the level increased. For sweet potato performance, 5 kg ha-1 ZnSO4 fertilizer had the highest values of foliage yield (vine length and vine weight) and storage root yield. Using the mean of the two years and compared with the control, ZnSO4 fertilizer at 5 kg ha-1 increased storage root yield of sweet potato by 17.4%. On fitting the mean storage root yield data of the two years with a cubic equation, the optimum rate of Zn for sweet potato was found to be 3.9 kg ha-1 to achieve the maximum sweet potato yield. In this study, relative to the control, ZnSO4 fertilizer increased moisture and decreased the fibre contents of sweet potato. There were no consistent patterns of variation between the 5, 10, 15 and 20 kg ha-1 ZnSO4 treatments for proximate qualities except that the highest values of fat, protein, carbohydrate and ash was at 5 kg ha-1 ZnSO4.

scholarly journals Resolvable (r, λ)-designs and the Fisher inequality

1979 ◽  
Vol 28 (4) ◽  
pp. 471-478 ◽  
Author(s):  
S. A. Vanstone
Keyword(s):  
Block Design ◽  
Incomplete Block ◽  
Balanced Incomplete Block Design ◽  
Incomplete Block Design ◽  
Pairwise Balanced Designs ◽  
Balanced Designs ◽  
Similar Inequality ◽  
Balanced Incomplete Block

AbstractIt is well known that in any (v, b, r, k, λ) resolvable balanced incomplete block design that b≧ ν + r − l with equality if and only if the design is affine resolvable. In this paper, we show that a similar inequality holds for resolvable regular pairwise balanced designs ((ρ, λ)-designs) and we characterize those designs for which equality holds. From this characterization, we deduce certain results about block intersections in (ρ, λ)-designs.

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